MISINTERPRETATION-All Lumia Will get Windows 10 update

All lumia devices is going to get #windows 10 update. It was MISINTERPRETATION that Lumia devices will not get Windows 10 update.
Some features will be lacking in few lumias for example "Hey! Cortana"
as it needs some high end configuration which needs "Snapdragon 800 or 805" chipset. Which is still present only in Nokia Lumia 930, 1520, Icon.